121304213340 has 48 divisors (see below), whose sum is σ = 350608312320. Its totient is φ = 31304312640.

The previous prime is 121304213297. The next prime is 121304213351. The reversal of 121304213340 is 43312403121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 121304213340.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32606800 + ... + 32610519.

It is an arithmetic number, because the mean of its divisors is an integer number (7304339840).

Almost surely, 2^121304213340 is an apocalyptic number.

121304213340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121304213340 is an abundant number, since it is smaller than the sum of its proper divisors (229304098980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121304213340 is a wasteful number, since it uses less digits than its factorization.

121304213340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65217362 (or 65217360 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 121304213340 its reverse (43312403121), we get a palindrome (164616616461).

The spelling of 121304213340 in words is "one hundred twenty-one billion, three hundred four million, two hundred thirteen thousand, three hundred forty".